1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
use anyhow::{anyhow, bail, Result};
use glam::IVec2;
use log::debug;
use serde::Serialize;
use std::{
fmt::Display,
io::{BufRead, BufReader, BufWriter, Lines, Write},
net::TcpStream,
str::FromStr,
};
pub struct Client {
rx: Lines<BufReader<TcpStream>>,
tx: BufWriter<TcpStream>,
}
impl Client {
pub fn new(host: &str) -> Result<Self> {
let sock = TcpStream::connect(host)?;
let rx = BufReader::new(sock.try_clone()?).lines();
let tx = BufWriter::new(sock);
Ok(Self { rx, tx })
}
pub fn read(&mut self) -> Result<Packet> {
let line = self.rx.next().ok_or(anyhow!("eof"))??;
let packet = Packet::parse(&line)?;
debug!("<- {packet:?}");
Ok(packet)
}
pub fn write(&mut self, packet: Packet) -> Result<()> {
debug!("-> {packet:?}");
self.tx.write_all(packet.dump().as_bytes())?;
self.tx.flush()?;
Ok(())
}
}
impl Packet {
pub fn dump(&self) -> String {
match self {
Packet::Join { username, password } => {
format!("join|{username}|{password}")
}
Packet::Move(dir) => {
format!("move|{dir}")
}
Packet::Chat(message) => {
format!("chat|{message}")
}
Packet::Motd(motd) => format!("motd|{motd}"),
Packet::Error(message) => format!("erro|{message}"),
Packet::Game {
my_id,
width,
height,
} => format!("game|{width}|{height}|{my_id}"),
Packet::Pos { id, x, y } => format!("pos|{id}|{x}|{y}"),
Packet::Player { id, name } => format!("player|{id}|{name}"),
Packet::Tick => format!("tick"),
Packet::Die(players) => format!(
"die|{}",
players
.into_iter()
.map(|x| format!("{x}"))
.collect::<Vec<_>>()
.join("|")
),
Packet::Message { id, message } => format!("message|{id}|{message}"),
Packet::Win(x, y) => format!("win|{x}|{y}"),
Packet::Lose(x, y) => format!("lose|{x}|{y}"),
}
}
pub fn parse(line: &str) -> Result<Self> {
let mut toks = line.split("|");
Ok(match toks.next().ok_or(anyhow!("packet type missing"))? {
"motd" => Packet::Motd(toks.next().ok_or(anyhow!("motd missing"))?.to_string()),
"error" => Packet::Error(
toks.next()
.ok_or(anyhow!("error message missing"))?
.to_string(),
),
"pos" => Packet::Pos {
id: toks.next().ok_or(anyhow!("id missing"))?.parse()?,
x: toks.next().ok_or(anyhow!("x missing"))?.parse()?,
y: toks.next().ok_or(anyhow!("y missing"))?.parse()?,
},
"game" => Packet::Game {
width: toks.next().ok_or(anyhow!("width missing"))?.parse()?,
height: toks.next().ok_or(anyhow!("height missing"))?.parse()?,
my_id: toks.next().ok_or(anyhow!("my id missing"))?.parse()?,
},
"player" => Packet::Player {
id: toks.next().ok_or(anyhow!("id missing"))?.parse()?,
name: toks.next().ok_or(anyhow!("name missing"))?.to_string(),
},
"tick" => Packet::Tick,
"die" => Packet::Die(toks.map(|e| e.parse()).try_collect()?),
"message" => Packet::Message {
id: toks.next().ok_or(anyhow!("id missing"))?.parse()?,
message: toks.next().ok_or(anyhow!("message missing"))?.to_string(),
},
"win" => Packet::Win(
toks.next().ok_or(anyhow!("something missing"))?.parse()?,
toks.next().ok_or(anyhow!("something missing"))?.parse()?,
),
"lose" => Packet::Lose(
toks.next().ok_or(anyhow!("something missing"))?.parse()?,
toks.next().ok_or(anyhow!("something missing"))?.parse()?,
),
"move" => Packet::Move(Direction::from_str(
toks.next().ok_or(anyhow!("direction missing"))?,
)?),
"join" => Packet::Join {
username: toks.next().ok_or(anyhow!("username missing"))?.to_string(),
password: toks.next().ok_or(anyhow!("password missing"))?.to_string(),
},
x => bail!("unknown command: {x:?}"),
})
}
}
#[derive(Debug, Serialize, Clone)]
#[serde(rename_all = "snake_case")]
pub enum Packet {
Motd(String),
Error(String),
Game {
my_id: u32,
width: usize,
height: usize,
},
Pos {
id: u32,
x: i32,
y: i32,
},
Player {
id: u32,
name: String,
},
Tick,
Die(Vec<u32>),
Message {
id: u32,
message: String,
},
Win(usize, usize),
Lose(usize, usize),
Join {
username: String,
password: String,
},
Move(Direction),
Chat(String),
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize)]
pub enum Direction {
Up,
Down,
Left,
Right,
}
impl Display for Direction {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str(match self {
Direction::Up => "up",
Direction::Down => "down",
Direction::Left => "left",
Direction::Right => "right",
})
}
}
impl FromStr for Direction {
type Err = anyhow::Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s {
"up" => Direction::Up,
"down" => Direction::Down,
"left" => Direction::Left,
"right" => Direction::Right,
x => bail!("unknown direction: {x:?}"),
})
}
}
impl Direction {
pub const ALL: [Direction; 4] = [Self::Up, Self::Down, Self::Left, Self::Right];
pub fn vector(self) -> IVec2 {
match self {
Direction::Up => (0, -1).into(),
Direction::Down => (0, 1).into(),
Direction::Left => (-1, 0).into(),
Direction::Right => (1, 0).into(),
}
}
pub fn rotate_ccw(self) -> Self {
match self {
Direction::Up => Direction::Right,
Direction::Down => Direction::Left,
Direction::Left => Direction::Up,
Direction::Right => Direction::Down,
}
}
}
|
